关键词: 复合材料, 阻尼性能, 损耗因子, 碳玻混杂

Abstract: In order to study the influence of resin type, fiber layup angle, fiber type and its hybrid method on the damping performance of composite materials, this paper aims at two kinds of marine composite materials matrices, epoxy resin QC350 and vinyl ester resin 430LV, two reinforcing fibers, carbon fiber T700 and glass fiber G430S. Composite specimens with different fiber and resin combinations were prepared by vacuum forming, and DMA tests were carried out. The results show that the damping performance of QC350 pure resin is better than that of 430LV, the loss factor is η_{max (QC350)}≈0.094 and η_{max (430LV)}≈0.078 in the frequency domain from 1 Hz to 1 kHz, but in the frequency domain the damping performance of 430LV resin matrix composites is more stable under the same temperature range; the damping performance of carbon fiber composite CFRP is not as good as that of glass fiber composite GFRP, within 1 Hz~1 kHz frequency, η_(T700/QC350)≈0.025, η_{(G430S/QC350)}≈0.030; the effect of fiber layup angle on the damping performance of composites is obvious, but it does not change the change trend of loss factor in frequency and temperature domains. The composites with layup angles of 90° and ±45° have better damping performance, the loss factor of the two layup angles is about 2~3 times that of the 0° layup; when the carbon-glass hybrid method with glass fiber is used outside, the damping performance of the composite material is better, and with the number of layers of the glass fiber increases, the damping performance of the glass fiber increases gradually.

Key words: composite material, damping performance, loss factor, carbon-glass hybrid